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Poznámky redaktora
Ambient
temperature °C
60 °C
(140 °F)
75 °C
(167 °F)
90 °C
(194 °F)
Number current-carrying
conductors
Correction factor
21 1,08 1,05 1,04 0,80
26 1,00 1,00 1,00 0,70
31 0,91 0,94 0,96 0,50
36 0,82 0,88 0,91 0,45
41 0,71 0,82 0,87 0,40
46 0,58 0,75 0,82 and more 0,35
51 0,41 0,67 0,76
56 0,58 0,71
61 0,33 0,58
71 0,41
Conductor
size
Temperature Rating Conductor
AWG or
kcmil (MCM)
60 °C
(140 °F)
75 °C
(167 °F)
90 °C
(194 °F)
18 18
16 24
14* 35
12* 40
10* 55
8 80
6 105
4 105 125 140
3 120 145 165
2 140 170 190
1 165 195 220
1/0 195 230 260
2/0 225 265 300
3/0 260 310 350
4/0 300 360 405
250 340 405 455
300 375 445 500
350 420 505 570
400 455 545 615
500 515 620 700
600 575 690 780
* Note Unless otherwise speci cally permitted elsewhere the NEC, the overcurrent protection for conductor types market with shall not exceed amperes
for AWG 14, amperes for AWG and amperes for AWG 10, after any correction factors for ambient temperature and numbers conductros have been
applied.
CURRENT RATINGS FOR UL-CSA CABLES
Ambient temperature °C
.
Conductor
size
Temperature Rating Conductor
AWG or
kcmil (MCM)
60 °C
(140 °F)
75 °C
(167 °F)
90 °C
(194 °F)
18 14
16 18
14* 25
12* 30
10* 40
8 55
6 75
4 95
3 100 115
2 115 130
1 110 130 145
1/0 125 150 170
2/0 145 175 195
3/0 165 200 225
4/0 195 230 260
250 215 255 290
300 240 285 320
350 260 310 350
400 280 355 380
500 320 380 430
600 350 420 475
Correction factors for ambient temperatures
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Correction factors for more than three current-
carrying conductors raceway cable.1121
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Abstract NEC Tabelle
Allowable ampacity (in Ampere) insulated conductors, rated 2000
Volts.
Abstract NEC Tabelle
Allowable ampacity (in Ampere) conductors, rated 2000 Volts,
in free air. NOT MORE THAN three Conductors raceway cable ore
Earth (direct burial)
